AMD Radeon R9 270X vs AMD Radeon R9 285X

VS

We compared two Desktop platform GPUs: 2GB VRAM Radeon R9 270X and 3GB VRAM Radeon R9 285X to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon R9 270X 's Advantages

Boost Clock1050MHz

Lower TDP (180W vs 200W)

AMD Radeon R9 285X 's Advantages

More VRAM (3GB vs 2GB)

Larger VRAM bandwidth (264.0GB/s vs 179.2GB/s)

768 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon R9 270X

2.688 TFLOPS

Radeon R9 285X +52%

4.104 TFLOPS

Radeon R9 270X

VS

Radeon R9 285X

Graphics Card

Oct 2013

Release Date

Unknown

Volcanic Islands

Generation

Volcanic Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

1000 MHz

Base Clock

-

1050 MHz

Boost Clock

-

1400 MHz

Memory Clock

1375 MHz

Memory

2GB

Memory Size

3GB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

384bit

179.2GB/s

Bandwidth

264.0GB/s

Render Config

-

SM Count

-

20

Compute Units

32

1280

Shading Units

2048

80

TMUs

128

32

ROPs

32

-

Tensor Cores

-

RT Cores

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

512 KB

L2 Cache

768 KB

Theoretical Performance

33.60 GPixel/s

Pixel Rate

32.06 GPixel/s

84.00 GTexel/s

Texture Rate

128.3 GTexel/s

-

FP16 (half)

-

2.688 TFLOPS

FP32 (float)

4.104 TFLOPS

168.0 GFLOPS

FP64 (double)

-

Graphics Processor

Curacao

GPU Name

Tonga

Curacao XT (215-0848004)

GPU Variant

Tonga XT (215-0851313)

GCN 1.0

Architecture

GCN 3.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

2.8 billion

Transistors

5 billion

212 mm²

Die Size

366 mm²

Board Design

180W

TDP

200W

450 W

Suggested PSU

550 W

2x DVI 1x HDMI 1.4a 1x DisplayPort 1.2

Outputs

2x DVI 1x HDMI 1.4a 1x DisplayPort 1.2

2x 6-pin

Power Connectors

1x 6-pin + 1x 8-pin

Graphics Features

12 (11_1)

DirectX

12 (12_0)

4.6

OpenGL

4.6

1.2

OpenCL

2.0

1.2

Vulkan

1.2

-

CUDA

-

5.1

Shader Model

6.3

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